I bet the worms you're carrying by, to the Managuense are really big, eh? MONSTERS! Lol.
Lol yea, well, I used to give my Managuense (only 5 inches) full 8 inch night crawlers, he would eat them slowly, swallowing what he could until he had room to fit more. After a while though i decided to stop overfeeding him, so now he gets small trout worms (they're like 3 inches and 2mm thick lol)
The oscar is scared of both.. he's pathetic, and I'm truly not a fan of oscars lol. From my personal experience they are way too emotional and tend to sit there and do nothing. The only excitement i get from watching my dad's Oscar is when he throws in some feeder gold fish that he picks up whenever he's out. (yes yes i know store feeders are bad, i give my Managuense home bread convict fry, but my dad insists that "since he's never gotten sick from them before, he probably wont get sick from them later").